The correct answer is (b), Section 20 of the Hindu Marriage Act, 1955.
Section 20 of the Hindu Marriage Act, 1955 provides for in camera proceedings under the Act. It states that all proceedings under the Act shall be conducted in camera, and no person shall be permitted to be present at any such proceedings other than the parties to the marriage, their pleaders, the witnesses, the arbitrator or the person presiding at the proceedings, and such other persons as the arbitrator or the person presiding at the proceedings may permit to be present.
The purpose of this provision is to protect the privacy of the parties to the marriage and to ensure that the proceedings are conducted in a fair and impartial manner.
Section 19 of the Hindu Marriage Act, 1955 deals with the jurisdiction of the courts to entertain petitions under the Act. Section 21 of the Hindu Marriage Act, 1955 deals with the procedure for filing a petition under the Act. Section 22 of the Hindu Marriage Act, 1955 deals with the powers of the court to make orders on a petition under the Act.